Kureha Corporation

Tokyo University of Science Foundation

Fujifilm Wako Pure Chemical Corporation

Shoko Aoki

Kuniaki Okamoto

Yasuhiro Tada

Shinichi Komaba

Shota Kobayashi

Takahiro Kiyosu

Kenta Aoki

Yasuyoshi Mori

Takatoshi Matsuura

Michihiko Sato

Kiyofumi Yamagiwa

To provide an electrode mixture that suppresses gelling of an electrode mixture slurry and maintains a high binding capacity between an electrode active material and a current collector even after an extended period of time has elapsed since an electrode mixture slurry was produced. The electrode mixture includes: a binder composition&#x2014;containing a first copolymer of vinylidene fluoride and a polar group-containing compound; and a second copolymer of vinylidene fluoride and chlorotrifluoroethylene&#x2014;; and an electrode active material of lithium oxide having a pH of water when extracted with water of not less than 10.5.

Electrode mixture, method for producing electrode mixture, electrode structure, method for producing electrode structure, and secondary battery

It is an object of the present invention to provide an electrode having superior charge-discharge capacity, even in the case of using an active material containing silicon. The present invention relates to 'a binder for a lithium cell comprises a polymer having a monomer unit derived from acrylic acid, and 1 to 2 kinds of monomer units derived from the compound shown by the general formula (I), the general formula (II), or the general formula (III), as constituents, and cross-linked by a cross-linking agent selected from the compounds described by the following general formulae [1] to [13], and the polymer described by the following general formula [14]', 'a composition for producing an electrode of a lithium cell comprising 1) an active material containing silicon, 2) a conductive assistant, and 3) the above-described binder for a cell', and &#x201c;an electrode for a lithium cell having 1) an active material containing silicon, 2) a conductive assistant, 3) the above-described binder for a cell, and (4) a current collector&#x201d;.

Binder for lithium cell

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Tokyo, Japan

Shoko Aoki